MAX4992ELB+T [MAXIM]
SPDT,;
| 型号： | MAX4992ELB+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SPDT, 光电二极管 |
| 文件： | 总10页 (文件大小：163K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4150; Rev 1; 6/09
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
1–MAX94
General Description
Features
The MAX4991–MAX4994 low on-resistance analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4991/MAX4993 feature a slow turn-on time to
reduce clicks and pops due to coupling capacitors and
audio amplifiers with a DC output bias. This feature pro-
vides click-and-pop reduction without adding additional
parts for existing architectures.
♦ Slow Turn-On for Click-and-Pop Reduction Without
Additional Parts
♦ Low 0.3Ω On-Resistance
♦ Low R
Flatness (1mΩ)
ON
♦ Low THD+N: 0.004%
♦ +1.8V to +5.5V Single-Supply Operation
♦ 1.2µA (typ) Supply Current
The MAX4991/MAX4992 are dual single-pole/double-
throw (SPDT) switches, while the MAX4993/MAX4994
are double-pole/double-throw (DPDT) switches. The
MAX4993/MAX4994 feature an active-low enable input
(EN) that sets all the channels to high impedance and
reduces supply current when driven high. These
devices have 0.3Ω on-resistance and 0.004% THD+N
to route high fidelity audio signals.
♦ Space-Saving Packages
10-Pin UTQFN (1.4mm x 1.8mm x 0.55mm)
Pin Configurations
The MAX4991–MAX4994 are available in space-saving
10-pin UTQFN (1.4mm x 1.8mm) package, and are
specified for operation over the -40°C to +85°C extend-
ed temperature range.
TOP VIEW
7
6
CB2
COM2
NO2
8
9
5
4
3
NC1
MAX4991/
MAX4992
CB1
10
COM1
Applications
1
2
Speaker Headset Source Switching
Cellular Phones
UTQFN
Portable MP3 Players
Audio Signal Routing
7
6
8
9
5
4
3
NC1
CB
EN
COM2
NO2
MAX4993/
MAX4994
10
COM1
1
2
Typical Application Circuit appears at end of data sheet.
UTQFN
Ordering Information/Selector Guide
SLOW-SWITCHING
TIME
TOP
MARK
PART
PIN-PACKAGE
CONFIGURATION
ENABLE LINE
MAX4991EVB+*
MAX4992EVB+
MAX4993EVB+
MAX4994EVB+*
10 UTQFN
10 UTQFN
10 UTQFN
10 UTQFN
Dual SPDT
Dual SPDT
DPDT
Yes
No
No
No
AAD
AAE
AAF
AAG
Yes
No
Yes
Yes
DPDT
Note: All devices operate over -40°C to +85°C extended temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
Junction-to-Case Thermal Resistance (θ ) (Note 1)
JC
V , CB_, EN ........................................................-0.3V to +6.0V
CC
10-Pin UTQFN ...........................................................20.1°C/W
COM_, NC_, NO_ ...................................... -0.3V to (V
Continuous Current COM_, NC_, NO_ ........................... 350mA
Peak Current COM_, NC_, NO_ (pulsed at 1ms,
50% duty cycle).......................................................... 700mA
Peak Current COM_, NC_, NO_ (pulsed at 1ms,
+ 0.3V)
Junction-to-Ambient Thermal Resistance (θ ) (Note 1)
CC
JA
10-Pin UTQFN.........................................................143.1°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature Range ..........................................+150°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
10% duty cycle).............................................................. 1.5A
Continuous Power Dissipation (T = +70°C)
A
10-Pin UTQFN (derate 6.9mW/°C above +70°C).........559mW
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
1–MAX94
ELECTRICAL CHARACTERISTICS
(V
= +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V
= +3.0V, T = +25°C.) (Note 2)
CC A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Power-Supply Range
Undervoltage Lockout
V
1.8
5.5
V
V
CC
V
UVLO
1.4
1.2
3.1
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= +3V
2.5
6
V
V
= V
= V
= 0V or V
CC
CB1
CB2
= +5.5V
= +2.7V
= +5.5V
= +5.5V
= +3V
Supply Current
(MAX4991/MAX4992)
I
μA
CC
CC
3
= +0.5V or
CB1
CB2
+1.4V
14
1
V
V
= V , V = 0V or V
CC
0.1
1.2
3.1
EN
EN
CC CB
2.5
6
= 0V, V = 0V or V
CB
CC
Supply Current
(MAX4993/MAX4994)
I
μA
= +5.5V
= +2.7V
= +5.5V
3
V
= V = +0.5V or +1.4V
CB
EN
8.5
Power-Supply Rejection
Ratio
PSRR
, V
R = R = 50ꢀ, f = 20kHz
80
dB
V
L
S
V
,
NC_ NO_
Analog Signal Range
On-Resistance
0
V
CC
V
COM_
T
T
= +25°C
0.3
0.5
0.6
V
CC
= +2.7V, V
or V = 0
NO_
A
NC_
R
ꢀ
ON
to V , I
= 100mA
CC COM_
= T
to T
MAX
A
MIN
On-Resistance Match
Between Channels
V
= +2.7V, between NC_, NO_ only,
CC
ꢁR
3
1
mꢀ
mꢀ
ON
I
= 100mA, V
or V = V /2
NO_ CC
COM_
NC_
V
CC
= +2.7V, V
or V
= 0 to V
,
NC_
NO_
CC
On-Resistance Flatness
COM_ Output Noise
R
FLAT
I
= 100mA (Note 3)
COM_
f = 20Hz to 20kHz
f = 0Hz to 1MHz
1
N
COM_
V
NC_
= V
= 0V, R = 50ꢀ
μV
RMS
NO_
L
50
2
_______________________________________________________________________________________
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
1–MAX94
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V
= +3.0V, T = +25°C.) (Note 2)
CC A
CC
A
PARAMETER
SYMBOL
CONDITIONS
= +2.7V, switch open, V
MIN
TYP
MAX UNITS
NC_, NO_, Off-Leakage
Current
V
or V
= 0V
CC
NC_
NO_
I
-100
+100
+100
nA
nA
L(OFF)
or V , V
= V or 0V
CC
CC COM_
COM_ Off-Leakage Current
(MAX4993/MAX4994)
V
CC
= +2.7V, V = V , V
or V
= 0V
NO_
EN
CC NC_
I
-100
120
COM_L(OFF)
or V , V
= V or 0V
CC
CC COM_
V
V
= +2.7V, switch closed, V
or V
= 0V,
CC
NC_
NO_
COM_ On-Leakage Current
I
or unconnected, V
= 0V, V , or
60
140
nA
COM_L(ON)
CC
COM_
CC
unconnected
DYNAMIC
V
CC
= +2.7V, V
or V = +1.5V, R = 50ꢀ,
NO_ L
NC_
360
20
630
150
2
ms
μs
μs
dB
dB
%
C = 35pF (MAX4991/MAX4993)
L
Turn-On Time
(Note 4) (Figure 1)
t
ON
V
CC
= +2.7V, V
or V = +1.5V, R = 50ꢀ,
NO_ L
NC_
C = 35pF (MAX4992/MAX4994)
L
V
CC
= +2.7V, V
or V = +1.5V, R = 50ꢀ,
NO_ L
NC_
Turn-Off Time
t
0.5
OFF
C = 35pF, Figure 1 (Note 4)
L
R
= R = 50ꢀ, f = 20kHz, V
Figure 2 (Note 5)
= 1V
= 1V
,
,
S
L
COM_
COM_
P-P
P-P
Off-Isolation
V
-90
ISO
R
= R = 50ꢀ, f = 20kHz, V
S
L
Crosstalk
V
CT
-110
0.004
45
Figure 2 (Note 6)
f = 20Hz to 20kHz, V
= 0.5V
,
P-P
COM_
Total Harmonic Distortion
NC_, NO_ Off-Capacitance
COM_ On-Capacitance
THD+N
R
= R = 50ꢀ, DC bias = 0V
L
S
COM_ = GND (DC bias), f = 1MHz,
= 100mV , (Figure 3)
C
pF
pF
OFF
V
NO(NC)
P-P
COM_ = GND (DC bias), f = 1MHz,
C
65
ON
V
= 100mV
(Figure 3)
P-P
COM
CB_
DIGITAL I/O (CB, CB1, CB2, EN)
Input Logic-High
V
1.4
-1
V
V
IH
Input Logic-Low
V
0.5
+1
IL
Input Leakage Current
I
V
= V = 0V or V
CC
μA
CB
EN
Note 2: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 3: Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the
specified analog ranges.
Note 4: All timing is measured using 10% and 90% levels.
Note 5: Off-isolation = 20log [V
/(V
or V
)], V
= output, V
or V
= input to off switch.
COM_ NO_
NC_
COM_
NO_
NC_
Note 6: Between any two switches.
_______________________________________________________________________________________
3
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
Test Circuits/Timing Diagrams
MAX4991/MAX4992/
MAX4993/MAX4994
t
t
< 5ns
< 5ns
R
F
V
IH
LOGIC
INPUT
50%
V
IL
NO_
COM_
V
IN_
V
OUT
OR NC_
t
OFF
R
L
C
L
CB_
V
OUT
0.9 x V
0UT
0.1 x V
OUT
LOGIC
INPUT
SWITCH
OUTPUT
0V
t
ON
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
R
L
V
= V
IN_
OUT
(
)
R + R
L
ON
Figure 1. Switching Time
1–MAX94
V
CC
V
V
OUT
OFF-ISOLATION = 20log
ON-LOSS = 20log
V
IN
NETWORK
ANALYZER
50Ω
50Ω
OUT
V
V
0V OR V
CC
IN
CB_
NC1
V
IN
NO_
V
OUT
MAX4991/MAX4992/
MAX4993/MAX4994
CROSSTALK = 20log
V
IN
MEAS
REF
OUT
COM_
50Ω
50Ω
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 2. On-Loss, Off-Isolation, and Crosstalk
MAX4991/MAX4992/
MAX4993/MAX4994
COM_
CB
V
OR V
IH
IL
CAPACITANCE
METER
NC_ OR
NO_
f = 1MHz
Figure 3. Channel Off-/On-Capacitance
4
_______________________________________________________________________________________
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
1–MAX94
Typical Operating Characteristics
(V
CC
= +3.0V, T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
ON-RESISTANCE vs. V
R
ON
FLATNESS vs. V
COM
COM
COM
0.50
0.45
0.6
0.300
0.298
0.296
0.294
0.292
0.290
V
CC
= +2.7V
V
= +2.7V
CC
T
= +85°C
A
0.5
0.4
0.3
0.2
0.1
0
V
= +1.8V
CC
0.40
0.35
0.30
0.25
T
A
= +25°C
V
= +2.7V
CC
V
= +3.3V
= +5.0V
CC
T
A
= -40°C
V
CC
0.20
0.15
0.10
0
1
2
3
0
1
2
3
4
5
0
1
2
3
V
(V)
V
(V)
V
(V)
COM
COM
COM
QUIESCENT SUPPLY CURRENT
vs. LOGIC LEVEL
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
10
9
8
7
6
5
4
3
2
1
0
4.0
3.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
= +5.5V
V
= V
CB2(EN)
= 0V
V
= V
CB2(EN)
= 0V
CC
CB1
CB1
V
CB2
= V = 0V
EN
3.0
2.5
2.0
1.5
V
= 5.5V
CC
V
= 2.7V
CC
1.0
0.5
0
0
2
4
6
-40
-15
10
35
60
85
1.5
2.5
3.5
(V)
4.5
5.5
V or V (V)
CB CB1
T
A
(°C)
V
CC
TURN-OFF TIME vs. SUPPLY VOLTAGE
TURN-ON TIME vs. SUPPLY VOLTAGE
TURN-ON TIME vs. SUPPLY VOLTAGE
500
450
400
350
300
250
200
150
100
50
400
390
380
370
360
350
340
330
320
310
300
30
25
20
15
10
MAX4991/MAX4993
MAX4992/MAX4994
5
0
0
2.5
3.5
4.5
5.5
2.5
3.5
4.5
5.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
Typical Operating Characteristics (continued)
(V
CC
= +3.0V, T = +25°C, unless otherwise noted.)
A
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY
FREQUENCY RESPONSE
SLOW TURN-ON RESPONSE
MAX4991 toc12
20
0
1
0.1
R = 50Ω
L
V
= +2.8V
CC
C
= 100μF
CL
R = 16Ω
L
-20
-40
-60
-80
ON-RESPONSE
V
IN
2V/div
OFF-RESPONSE
CROSSTALK
V
COM
1V/div
-100
-120
-140
-160
0.01
0.001
I
COM
10mA/div
10
100
1000
10,000
100,000
10
100
1000
100,000
20ms/div
1–MAX94
FREQUENCY (Hz)
FREQUENCY (Hz)
Pin Description
PIN
NAME
FUNCTION
MAX4991/MAX4992 MAX4993/MAX4994
Positive-Supply Voltage Input. Bypass V
as close as possible to the device.
to GND with a 0.1µF capacitor
CC
1
2
3
1
2
3
V
CC
NO1
Analog Switch 1—Normally Open Terminal
Analog Switch 1—Common Terminal. COM1 must be connected to the
speaker load for click-and-pop reduction.
COM1
4
—
5
—
4
CB1
CB
Digital Control Input for Switch 1
Digital Control Input for Switch 1 and Switch 2
Analog Switch 1—Normally Closed Terminal
Ground
5
NC1
GND
NC2
CB2
6
6
7
7
Analog Switch 2—Normally Closed Terminal
Digital Control Input for Switch 2
8
—
Active-Low Enable Input—Drive EN high to put switches in high
impedance. Drive EN low for normal operation.
—
8
EN
Analog Switch 2—Common Terminal. COM2 must be connected to the
speaker load for click-and-pop reduction.
9
9
COM2
NO2
10
10
Analog Switch 2—Normally Open Terminal
6
_______________________________________________________________________________________
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
1–MAX94
Functional Diagram
MAX4991/MAX4992
MAX4993/MAX4994
CB1
NC1
NO1
CB
NC1
NO1
COM1
COM2
COM1
COM2
NC2
NO2
CB2
NC2
NO2
EN
MAX4991/MAX4992
NO1
MAX4993/MAX4994
CB1
NC1
ON
EN
0
CB
0
NO_
OFF
ON
NC_
ON
0
1
OFF
ON
OFF
0
1
OFF
OFF
1
X
OFF
MAX4991/MAX4992
X = DON'T CARE.
CB2
NO2
OFF
ON
NC2
ON
0
1
OFF
Digital Control Input
Detailed Description
The MAX4991/MAX4992 have two digital control logic
inputs, CB1 and CB2. The MAX4993/MAX4994 have a
single digital-control logic input, CB. The digital control
logic inputs control the position of the corresponding
switch as shown in the Functional Diagram. Driving
logic inputs rail-to-rail minimizes power consumption.
The MAX4991–MAX4994 low 0.3Ω (typ) on-resistance
analog switches have break-before-make switching
and operate from a single +1.8V to +5.5V supply. The
MAX4991/MAX4993 provide a slow turn-on time, and
with COM_ used as the output, reduce clicks and pops
due to coupling capacitors and audio amplifiers with a
DC output bias. This feature is important for existing
architectures with coupling capacitors at the output that
need click-and-pop reduction.
Enable Input (MAX4993/MAX4994)
The MAX4993/MAX4994 feature an active-low enable
input (EN). When EN is driven high, the switches are
high impedance and reduce supply current. When EN
is driven low, the MAX4993/MAX4994 operate in nor-
mal mode. Driving EN rail-to-rail minimizes power con-
sumption.
The MAX4993/MAX4994 DPDT switches with an active-
low enable input (EN) set all channels to high imped-
ance and reduce supply current when driven high. The
MAX4991–MAX4994 have a low 0.004% THD+N to
route high-fidelity audio signals.
_______________________________________________________________________________________
7
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
changes usually occur when a single-supply audio
Analog Signal Levels
amplifier with a DC bias is turned on, causing a spike of
current in the speaker while the coupling capacitor
charges (see the Typical Operating Circuit). If the audio
amplifier connected to the unused input is powered up
before the switch position changes, the MAX4991/
MAX4993 reduce the current spike to COM_. The
speaker load must be present so that the current
charging the coupling capacitor has a path to ground.
The MAX4991–MAX4994 have a very low and stable
ON
R
, 0.3Ω (typ), as the analog input signals are swept
from ground to V
(see Typical Operating Character-
CC
istics). These switches are bidirectional, allowing NO_,
NC_, and COM_ to be configured as either inputs or
outputs; however, click-and-pop reduction is only oper-
ational when COM_ is used as the output.
Power-Supply Rejection Ratio
PSRR is the measurement of AC power-supply ripple or
noise that couples to the output. Variations in supply volt-
Layout
Good layout improves performance by decreasing the
amount of stray capacitance and noise. Minimize PCB
trace lengths and resistor leads and place external
components as close as possible to the device.
age corrupt the audio signal due to changes in the R
ON
value by supply modulation. The MAX4991–MAX4994
maintain a 80dB (typ) PSRR across the supply-voltage
range, eliminating any corruption of the audio signal from
supply variations. Therefore, with no audio signal, the
Power-Supply Sequencing
Caution: Do not exceed the absolute maximum rat-
ings because stresses beyond the listed ratings
may cause permanent damage to the device.
R
ON
variation due to supply-voltage ripple does not con-
tribute to any output signal modulation.
1–MAX94
Applications Information
Proper power-supply sequencing is recommended for
all devices. Always apply V
before applying analog
CC
Click-Pop Reduction
The MAX4991/MAX4993 feature a slow switch turn-on
that can reduce click-and-pop noise caused by abrupt
changes in voltage across a speaker. These voltage
signals especially if the analog signal is not current
limited.
8
_______________________________________________________________________________________
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
1–MAX94
Typical Application Circuit
V
CC
0.1μF
NC1
NC2
AUDIO
AMPLIFIER
MAX4991/MAX4992
CB1
COM1
COM2
CB2
NO1
NO2
AUDIO
AMPLIFIER
GND
Chip Information
Package Information
For the latest package outline information and land patterns, go
PROCESS: BiCMOS
to www.maxim-ic.com/packages.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
10 UTQFN
V101AICN-1
21-0028
_______________________________________________________________________________________
9
Low R , Dual-SPDT/Single-DPDT Analog
ON
Switches with Slow Turn-On Time
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
5/08
Initial release.
—
• Corrected names of power pins (added subscripting) in Electrical Characteristics.
• Changed the name of TOC 10 to “Frequency Response.”
• Added units of measure to TOC 12.
1
6/09
2, 6
1–MAX94
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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